To ensure turbulent conditions and minimum mixing time during agitation with a turbine impeller, the Reynolds number must be at least 10⁴. A stirred laboratory-scale fermenter with a turbine impeller 5 cm in diameter is operated at 800 rpm. If the density of broth being stirred is close to that of water. The mixing system is scaled up so the tank and impeller are 15 times the diameter of the laboratory equipment. The stirrer in the large vessel is operated so that the stirrer tip speed (tip speed = π N i D i) is the same as in the laboratory apparatus. How does scale-up affect the maximum viscosity. 

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#Question id: 2967

#Part-A Aptitude & General Biotechnology

G1 is associated with which of the following cellular events?

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#Question id: 2968

#Part-A Aptitude & General Biotechnology

What is the name of the microtubule-organizing center found in animal cells as an identifiable structure present during all phases of the cell cycle?

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#Question id: 2968

#Part-B Specialized Branches in Biotechnology

What is the name of the microtubule-organizing center found in animal cells as an identifiable structure present during all phases of the cell cycle?

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#Question id: 2969

#Part-B Specialized Branches in Biotechnology

In the cells of many eukaryotic species, the nuclear envelope has to disappear to permit which of the following events in the cell cycle?

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#Question id: 2976

#Part-B Specialized Branches in Biotechnology

Match the following Regulators with its functions.

Column I	Column II
A.  Wee1 kinase	i. Degradation of phosphorylated Sic1 or p27KIP1
B. Cdc25A phosphatase	ii. Induces degradation of B-type cyclins
C. APC/CCdc20	iii. Activates vertebrate S phase CDKs
D. SCF	iv. Inhibits CDKs

Which of the following is correct?

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#Question id: 2982

#Part-B Specialized Branches in Biotechnology

Match the following proteins (Column I) with their functions (Column II) during cell cycle.

Column I	Column II
A. Cdc25C phosphatase	i. Activates vertebrate S phase CDKs
B. INK4	ii. Activation of Mitotic CDKs
C. Cdc25A phosphatase	iii. Binds and inhibits G1 CDKs
D. APC/CCdc20	iv. Degradation of securin